Wound board machine



Dec. 7, 1954 k J. TEMPERLEY 7 WOUND BOARD MACHINE Filed May 31, 1950 3Sheets-Sheet 1 v I I nbenlor AW 7E? P519; 5 y

J. TEMPERLEY WOUND BOARD MACHINE 5 Sheets-Sheet 2 Filed May 31, 1950Dec. 7, 1954 J. TEMPIERILEY 2,696,150

WOUND BOARD MACHINE Filed May 51, 1950 s Sheets-Sheet 3 Inventor 707w7Zwpsm4ey Patented Dec. 7, 1954;

WOUND BOARD MACHINE John Temperley, Bury, England, assignor to Walmsleys(Bury) Limited, Bury, England Application May 31, 1950, Serial No.165,21il

'Claims priority, application Great Britain June 8, 1949 3 Claims. (Cl.92-67) This invention concerns cutting blades for wound board machines.

In such machines one, two or sometimes three, thinpaper webs are Woundon a forming or making-up roll until a predetermined thickness has beenattained; thereafter the cylindrical thick sheet is cut across its widthto enable it to be removed from this making-up roll. This cross-cuttinghas previously been effected manually by displacing a pointed or sharpinstrument across the roll with its end guided in a transverselyextending groove in the roll surface. Cutting has also been performed bya radially outward displacement of a cutter such as a wire or bladenormally contained in a transverse groove in the roll.

Although the known methods of cutting the cylindrical sheet can be usedwhilst the roll is rotating, there is a definite limitation to the sheetthickness and this is, to some extent, related to the linear velocity ofthe sheet surface.

An object of the present invention is to enable relatively thick and/orwide sheets to be cut during rotation thereof especially at relativelyhigh linear velocities.

The invention will be described further by way of example with referenceto the accompanying drawings in which:

Fig. l is a left hand diagrammatic end elevation of a wound boardmachine,

Fig. 2 is a corresponding front elevation of the machine; and

Figs. 3 and 4 are fragmentary front elevations partly in section on anenlarged scale showing details of the left hand and right hand ends ofthe machine, respectively.

A making-up roll 11 is mounted on a shaft 12 carried in bearings 13(Fig. 3) and 14 (Fig. 4).

A cam 15 is fixed on the shaft 12 near the left hand end thereof andanother cam 16 is fixed to the shaft 12 near its right hand end. Theseearns 15 and 16 thus revolve with the roll 11.

A fixed cam 17 surrounding the shaft 12, is mounted adjacent to therotary cam 15, and another fixed cam 18 is mounted adjacent to therotary cam 16.

A blade 19 having spaced teeth 19a can be accommodated within a grooveextending from end to end of the roll 11, so that, as shown in Fig. 1,the teeth do not project beyond the groove in a radially outwarddirection. The blade 19 is mounted on two rollers 20 which can roll inboxes 21, allowing the blade to move along the slot in the roll 11. Eachbox 21 is fixed to the outer end of a rod 22 which passes through a borein a guide 23 carried by a bracket 24 fixed to the appropriate end faceof the roll 11. Each rod 22 then passes through a coiled compressionspring 25 and terminates in a clevis 26 carrying a roller cam follower27.

The left hand follower 27 rolls around the surface of the fixed cam 17when the roll 11 and the shaft 12 rotate; and likewise the right handfollower 27 rolls around the surface of the fixed cam 18.

it will be seen from the contours of these cams as illustrated in Fig. 1that displacement of the followers 27 in a radially outward directionwill take place once in every revolution of the shaft 12. This outwarddisplacement causes compression of the springs 25 and outward movementof the rods 22 and therewith of the blade 19 by way of the boxes 21 andthe rollers 20 to partially cut or perforate sheets of wet board on theforming or making-up roll .11. The springs 25 maintain the followers incontact with the cam surfaces and return the blade and associated partsback to the position shown in Fig. 2 after the cam lobes have beenpassed.

A ram 28 has its cylinder head pivoted on a bracket 29 fixed to the roll11 and its piston rod pivoted to one arm of a bell-crank lever 30mounted on a fulcrum pin 31 fixed to the bracket 24. The other arm ofthe bellcrank lever 30 is pivoted to the blade 19. The ram is connectedto an axial bore 12a (Fig. 3) in the shaft 12 by way of a flexible pipeor hose 32. The left hand end of the shaft 12 is counterbored to receivecomponents of a stuffing box providing a rotary seal around an airsupply pipe 33 which is fixed.

If air is passed from the pipe 33 into the bore 12a and thence throughthe pipe 32 to the ram 28 the piston of the ram will be displaced. Suchdisplacement swings the hell-crank lever clockwise (Fig. 2) and movesthe blade 19 in a direction towards the right in Fig. 2, causing a crosscutting motion and severing of the Wet board on the make up roll 11. Atension spring 34 connected between the right hand end of the blade 19and a lug on the roll 11 is extended on rightward displacement of theblade; this spring 34 reexerts itself when the air pressure to the ramis released, causing return movement of the parts to the position shownin Fig. 2. This movement of the blade to the right or to the left causesthe rollers 20 to move within the boxes 21, which nevertheless definethe radial position of the blade relative to the roll 11.

The air supply pipe 33 is connected to the outlet of a hand operatedvalve 35 of which the inlet is connected by way of a mechanicallyoperated valve 36 to a source of air, S. The mechanical valve 36 isopened for a part of the revolution of the shaft 12 by actuating gearcomprising a follower 37, a lever 38 pivotally connected at its ends tothe lever 40 and to the operating arm illa of the valve 35.

The hand operated valve 35 is a two-way valve, capable of bringing thepipe 33 into communication with valve 36 which periodically delivers airunder pressure, or with the atmosphere so as to release the air pressurein the ram 28.

If the hand operated valve 35 is moved to the position for supplying airto the ram, such air is only delivered over a portion of the rotation ofthe shaft 12 as defined by the cam 15 with which the follower 37co-operates.

There is a bore 12b in the right hand end portion of the shaft 12 (Fig.4). The outer end of this bore is counterbored to receive a concentricdouble rotary stuifing box assembly whereby a fixed pipe 41 ismaintained in communication with the bore 12b and a fixed pipe 42 incommunication with a pipe 43 which extends axially within the bore 12.)and revolves with the shaft 12. The pipe 43 is connected to the inlet ofa valve 44 carried by the roll 11. The outlet of the valve 44 isconnected by way of a pipe 45 to the bore 12b which is also connected bya conduit or pipe 46 within the roll 11 to a series of ports 11adisposed at spaced intervals adjacent to the blade 19 on the trailingside thereof.

The operating arm of the valve 44 is connected by way of a link 47 toone arm of a lever 48 fulcrurnmed at 49 on a pin carried by the righthand bracket 19b. The other arm of the lever 48 is coupled by apin-and-slot connection to the right hand end of the blade 19.

The pipe 42 is connected by way of a mechanically operated valve 50 tothe air supply S. The valve 50 is actuated by valve gear (not shown, butsimilar to that associated with the valve 36) driven by the cam 16.

The pipe 41 leads to the ram 51 (Fig. 1) of a pneumatically operatedscraper mounted on a fixed bracket 52 and having a blade 53 which isdisplaceable, when air is supplied to the ram, in a direction towardsthe centre of the roll 11. If the roll 11 and hence the cam 16 is insuch a position that the valve 50 is open, air under pressure can passthrough the pipe 42, to the valve 44. The valve 44 is open when theblade 19 is displaced to the right from the position shown in Fig. 2, i.e. immediately after a cross cutting stroke of the blade 19. Under theseconditions compressed air is supplied to the ports 11a through the pipe45, the bore 12b and pipe 46, and to the scraper ram 51 through the pipe41 which is in communication with the bore 12b.

The scraper 53 serves to detach the cut lengths of board from the makeup roll 11 after these have been loosened by the air jets 11a.

1 claim:

1. An apparatus for cutting wound board comprising a making up rollmounted on a shaft, a groove in said roll, a blade in said grooveparallel to said shaft, cams on said shaft pneumatic valves actuated bysaid earns, a manually operated pneumatic valve, a pneumatic ramconnected to said blade to reciprocate it and means to cause said bladeto project from said groove when it is reciprocated and to withdraw whenit is not.

2. An apparatus as set forth in claim 1 in which said means to causesaid blade to project and withdraw consists of a stationary cam oflonger dwell than the cams on said shaft so that the transverse actionof the blade is effected before it retracts radially.

3. An apparatus for cutting wound wet fibrous material sheets,comprising a making up roll, a transversely extending groove in saidroll, a blade with spaced teeth mounted in said groove, a pneumatic ramconnected to said blade to reciprocate said blade in'a directionparallel to its length, means to cause said blade to project from saidgroove, spring means to retract said blade, an air supply line to saidram, and a manually operated valve arranged in said supply line toactuate said ram.

References Cited in the file of this patent Number 5 353,555 465,427713,361 978,587 1,001,896 10 1,016,945 1,127,807 1,459,041 1,590,1671,608,129 15 1,665,834 1,797,448 1,825,250 1,986,212 2,010,078 02,030,684 2,355,006 2,396,104 2,509,047

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